The broader the topic, the easier it is, not only to fill a book, but to set the bar pretty high for really great stuff.

Life contains these things: leakage and wickage and discharge, pus and snot and slime and gleet. We are biology. We are reminded of this at the beginning and the end, at birth and at death. In between we do what we can to forget.

Yes, the money could be better spent on Earth. But would it? Since when has money saved by government redlining been spent on education and cancer research? It is always squandered. Let's squander some on Mars. Let's go out and play.

You do not question an author who appears on the title page as "T.V.N. Persaud, M.D., Ph.D., D.Sc., F.R.C.Path. (Lond.), F.F.Path. (R.C.P.I.), F.A.C.O.G.

I dont fear death so much as I fear its prologues: loneliness, decrepitude, pain, debilitation, depression, senility. After a few years of those, I imagine death presents like a holiday at the beach.

The writing is always the easy part, provided I can get the good material. It's the getting of the good material that's a challenge.

To me, NASA is kind of the magical kingdom. I was sort of a geek, and you go there, and there are just these wondrously strange things and people.